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SINGLE SIDEBAND RADIO COMMUNICATION EQUIPMENT
GENERAL:
CHANNELS ..... .............. Four
TYPE OF OPERATION ......... Simplex
("Push-to-talk" telephone, or tele
graph)
FREQUENCY RANGE
Channels 1 and 2 .... 3. 0 - 6. 7 Me
Channels 3 and 4 .. . 6. 7 - 15. 0 Me
ANTENNA REQUIRED ...... Resistance:
10-80 ohms.
(min. ).
Single wire not to exceed
1/4 wave length at highest channel
frequency.
CRYSTALS REQUIRED ....... 1 - 250 Kc
Type CR-47/U. 1 - 1150 Kc Type
CR-27/U.
4 - Type CR-27/U (one
per channel).
NOTE:
Channel crystals must be 1400 Kc
higher in frequency than the desired
operating frequency.
crystal serves both transmitter and
receiver.
EMISSION
Phone ..... Single Sideband Suppressed
Carrier .
. . . . . Single Sideband With Carrier.
Telegraph .. A 1; Single Sideband Keyed
Tone.
RECEPTION .. Single Sideband Suppressed
Carrier.
. . . . . Single Sideband With Carrier.
... .. A1;
Single
Sideband Keyed Tone; A3.
KEYING SPEED ... 30 Words Per Minute -
manual (break-in) operation,
..... ... 60 Words Per Minute -
teleprinter operation.
TRANSMITTER:
PO WER OUTPUT ........ .... 60 watts
FREQUENCY STABILITY ..... ±0.0005 %
CLARIFIER RANGE . ..... ..... ± 75 cps
RCA TYPE SSB·l
GENERAL DESCRIPTION
TECHNICAL SUMMARY
Capacitance: 300 uuf
The same
A2;
A2
Keyed
Tone;
I
TRANSMITTED SIDEBAND ....... Lower
UNWANTED SIDEBAND ...
SUPPRESSION
CARRIER SUPPRESSION .......... 50 db
HARMONIC SUPPRESSION .... ... .. 56 db
AUDIO INPUT .... a) Single Button Carbon
Microphone From Local Handset or
From Up To 3 Remote Positions .
. . . . b) -6 DBM in 600 Ohm
Line for Full Transmitter Output.
AUDIO FIDELITY ..... ±2 db, 350-3000 cps
AMOUNT OF SPEECH CLIPPING .... 20 db
TRANSMITTED SIDEBAND DISTORTION:
Single tone, full power output, no
clipping ....... 2. 5% at 1000 cps
TWO-TONE TEST:
Distortion Products ... ... -26 db
RECEIVER:
SENSITIVITY ... Better than 1 microvolt for
50 milliwatts output with 6 db signal
to-noise ratio.
SELECTIVITY .. Determined by mechanical
filter characteristics: 3. 2 Kc nomi
nal bandwidth for 6 db attenuation;
6. 5 Kc bandwidth for 60 db attenu
ation .
AUDIO FIDELITY
...
.
AUDIO OUTPUT .. . a) 2 watts maximum in
speaker.
... b) With 50 mw output in
loudspeaker, audio level in 600 ohm
line is -7 DBM.
AUDIO DISTORTION .
TWO-TONE TEST:
Distortion Products .. ......... -26 db
4
... ..
50 db
.
.
.
2 db, 350-3000 cps
±
...
2.5% (1000 cps
.
.
at 50 milliwatts output)
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